Defensive publication

ABSTRACT

MULTILAYER COLOR FILMS OF THE INCORPORATED COUPLER TYPE ARE STABILIZED SO AS TO MAINTAIN THEIR SENSITOMETRIC PROPERTIES DURING STORAGE BY HARDENING THE EMULSION LAYERS WITH AN ALDEHYDIC GELATIN HARDENER SUCH AS SUCCINALDEHYDE BIS-BISULFITE, NEUTRALIZING UNREACTED HARDENER WITH, FOR EXAMPLE, HYDROXYLAMINE SULFATE, TREATING THE EMULSION LAYERS WITH BROMIDE SALT SOLUTION AND DRYING THE FILM.

EFENSWE ULIGATIQN UNITED STATES PATENT OFFICE Published at the requestof the applicant or owner in accordance with the Notice of Dec. 16,1969, 869 0.G. 687. The abstracts of Defensive Publication applicationsare identified by distinctly numbered series and are arrangedchronologically. The heading of each abstract indicates the number ofpages of specification, including claims and sheets of drawingscontained in the application as originally filed. The files of theseapplications are available to the public for inspection and reproductionmay be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofllce makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED MARCH 21, 1972 T896,043 STABILIZATION 0F PHOTOGRAPHIC MULTI-LAYER COLOR PRODUCTS Harry C. Baden, Webster, N.Y. (1669 Lake Ave.,Rochester, N.Y. 14615), and Charleton C. Bard and James S. Bruce, bothof 1669 Lake Ave., Rochester, N.Y. Filed Mar. 1, 1971, Ser. No. 120,057Int. Cl. G03c 1/76 U.S. Cl. 96-68 No Drawing. 17 Pages SpecificationMultilayer color films of the incorporated coupler type are stabilizedso as to maintain their sensitometric properties during storage byhardening the emulsion layers with an aldehydic gelatin hardener such assucoinaldehyde bis-bisulfite, neutralizing unreacted hardener with, forexample, hydroxylamine sulfate, treating the emulsion layers withbromide salt solution and drying the film.

